node.c

   1 /*
   2  *   This program is free software; you can redistribute it and/or modify
   3  *   it under the terms of the GNU General Public License as published by
   4  *   the Free Software Foundation; either version 2 of the License.
   5  *
   6  *   This program is distributed in the hope that it will be useful,
   7  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9  *   GNU General Public License for more details.
  10  *
  11  *   You should have received a copy of the GNU General Public License
  12  *   along with this program; if not, write to the Free Software
  13  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  14  *
  15  *   Copyright (C) 2020 embedd.ch
  16  *   Copyright (C) 2020 Felix Fietkau <nbd@nbd.name>
  17  *   Copyright (C) 2020 John Crispin <john@phrozen.org>
  18  */
  19
  20 #include "usteer.h"
  21
  22 void usteer_node_set_blob(struct blob_attr **dest, struct blob_attr *val)
  23 {
  24         int new_len;
  25         int len;
  26
  27         if (!val) {
  28                 free(*dest);
  29                 *dest = NULL;
  30                 return;
  31         }
  32
  33         len = *dest ? blob_pad_len(*dest) : 0;
  34         new_len = blob_pad_len(val);
  35         if (new_len != len)
  36                 *dest = realloc(*dest, new_len);
  37         memcpy(*dest, val, new_len);
  38 }